He did a straight-up Breath of the Wild shield jump
I could see it coming but still it felt amazing watching him catch up to the front, didn't expect him to win the first round but then he got turned into a human golden snitch so the stakes are still very high

Of all characters though, Bertholt?, really? It's fair to say that the Colossal Titan in the first episode is one of the most iconic anime moments of the 2010s so it was pretty underwhelming for it to be that guy all along (or maybe he isn't as much of a background character as I think he is and I'm just not good at remembering the first series, I am currently reading the manga though only on volume 4 so far). I was personally thinking it was gonna be Dott Pixis because of how similar he looks to the colossal titan, I know that's a dumb reason but still and I also thought the Armoured titan was gonna be Jean because he and Eren had a sort of rivalry which ties in with Annie beating Eren easily in hand to hand combat being a good setup for the same thing on a larger scale

Anyway the casual reveal was very good and the way the episode ended has built a lot of hype for the next episode, also obviously Isayama knows what's better for the story than I do of course.